#include <Windows.h>
#include <tchar.h>
#include <assert.h>

BOOL CALLBACK EnumWndProc(HWND hWnd, LPARAM lParam)
{
	HWND* hParent = (HWND*)lParam;
	TCHAR szClassName[MAX_PATH];
	GetClassName(hWnd, szClassName, MAX_PATH);
	if (NULL != GetWindow(hWnd, GW_CHILD))
	{
		HWND hShellDLL = FindWindowEx(hWnd, NULL, _T("SHELLDLL_DefView"), NULL);
		if (NULL != hShellDLL)
		{			
			HWND hListView = FindWindowEx(hShellDLL, 0, _T("SysListView32"), NULL);
			if (NULL != hListView)
			{
				*hParent = hListView;
				return FALSE;
			}
		}
	}

	return TRUE;
}

//////////////////////////////////////////////////////////////////////////
LRESULT CALLBACK WndProc(HWND hWnd, UINT nMsg, WPARAM wParam, LPARAM lParam)
{	
	static const UINT IDC_BTNSETTHUMBTACK		= 1001;
	static const UINT IDC_BTNEXIT				= 1002;

	switch (nMsg)
	{
		case WM_CREATE:
		{
			//--: Move Main wnd to center of screen
			RECT rtMainWnd;
			GetClientRect(hWnd, &rtMainWnd);
			UINT nSrnWidth		= GetSystemMetrics(SM_CXFULLSCREEN);
			UINT nSrnHeight		= GetSystemMetrics(SM_CYFULLSCREEN);
			UINT nWndWidth		= (rtMainWnd.right - rtMainWnd.left);
			UINT nWndHeight		= (rtMainWnd.bottom - rtMainWnd.top);
			UINT nLeft			= (nSrnWidth - nWndWidth) / 2;
			UINT nTop			= (nSrnHeight - nWndHeight) / 2;
			MoveWindow(hWnd, nLeft, nTop, nWndWidth, nWndHeight, TRUE);
			
			CreateWindow(_T("Button"), _T("Set Thumbtack Wnd"), WS_CHILD|WS_VISIBLE, 0, 0, 150, 40, hWnd, (HMENU)IDC_BTNSETTHUMBTACK, NULL, NULL);
			CreateWindow(_T("Button"), _T("Exit"), WS_CHILD|WS_VISIBLE, 200, 0, 150, 40, hWnd, (HMENU)IDC_BTNEXIT, NULL, NULL);

			break;
		}
		case WM_COMMAND:
		{
			switch (wParam)
			{
				case IDC_BTNSETTHUMBTACK:
				{
					HWND hListView;
					EnumWindows(EnumWndProc, (LPARAM)&hListView);
					if (NULL != hListView)
					{
						SetWindowLong(hWnd, GWL_STYLE, GetWindowLong(hWnd, GWL_STYLE) & ~(WS_CAPTION | WS_THICKFRAME));   
						SetParent(hWnd, hListView);
					}
					break;
				}
				case IDC_BTNEXIT:
				{
					PostQuitMessage(0);
					break;
				}
			}
			break;
		}
		case WM_LBUTTONDOWN:
		{
			SendMessage(hWnd, WM_NCLBUTTONDOWN, HTCAPTION, lParam);
			break;
		}
		case WM_DESTROY:
		{
			PostQuitMessage(0);
			break;
		}
	}

	return ::DefWindowProc(hWnd, nMsg, wParam, lParam);
}

//////////////////////////////////////////////////////////////////////////
bool RegisterWndClass(HINSTANCE hInstance, const TCHAR* szClsName)
{
	WNDCLASSEX wcs		= {0};
	wcs.cbSize			= sizeof(WNDCLASSEX);
	wcs.hbrBackground	= (HBRUSH)GetStockObject(COLOR_APPWORKSPACE);
	wcs.lpszClassName	= szClsName;
	wcs.lpfnWndProc		= WndProc;
	wcs.hCursor			= LoadCursor(NULL, MAKEINTRESOURCE(IDC_ARROW));
	wcs.hIcon			= LoadIcon(hInstance, MAKEINTRESOURCE(IDI_APPLICATION));
	wcs.style			= CS_VREDRAW|CS_HREDRAW;
	
	return (0 != RegisterClassEx(&wcs));
}

//////////////////////////////////////////////////////////////////////////
bool CreateMainWnd(HINSTANCE hInstance, const TCHAR* szClsName, const TCHAR* szWndCaption)
{
	if (NULL != szClsName && NULL != szWndCaption)
	{
		HWND hWnd = CreateWindowEx(WS_EX_APPWINDOW, szClsName, szWndCaption, WS_VISIBLE|WS_CAPTION|WS_POPUPWINDOW, 
								   0, 0, 800, 480, NULL, NULL, hInstance, hInstance);
		if (NULL != hWnd && IsWindow(hWnd))
		{
			ShowWindow(hWnd, SW_SHOW);
			UpdateWindow(hWnd);
			return true;
		}
	}
	return false;
}

//////////////////////////////////////////////////////////////////////////
void RunMessageLoop()
{
	MSG Msg;
	while (true)
	{
		while (PeekMessage(&Msg, NULL, 0, 0, PM_REMOVE))
		{
			if (WM_QUIT == Msg.message)
			{
				return;
			}

			TranslateMessage(&Msg);
			DispatchMessage(&Msg);
		}
	}
}
//////////////////////////////////////////////////////////////////////////
BOOL WINAPI _tWinMain(HINSTANCE hInstance, HINSTANCE hPreInstance, LPTSTR szCmdLine, int nShowCmd)
{
	const TCHAR* szClsName		= _T("Win32App");
	const TCHAR* szWndCaption	= _T("Demo0041");

	if (RegisterWndClass(hInstance, szClsName))
	{
		if (CreateMainWnd(hInstance, szClsName, szWndCaption))
		{
			RunMessageLoop();
		}
	}

	return TRUE;
}